基于磁通门磁强计平行分量法的深层涡流检测
Deep-Lying Eddy Current Testing Based on Measuring the Parallel Component of the Flux-Gate Magnetometer
摘 要
采用磁场平行分量法，用磁通门磁强计进行深层涡流检测，该方法通过测量方向与本底磁场垂直的涡流磁场平行分量的方式，能有效避免较强的本底磁场干扰，并能清晰分辨线缺陷与十字形缺陷的特征，对多层铝板的检测深度至少达到14 mm，并发现十字形缺陷的涡流磁场信号幅度比线缺陷的涡流磁场信号幅度更强，且随着缺陷深度的增加，其信号幅度衰减速率更慢。
深层缺陷
磁通门磁强计
eddy current testing
deep-lying defect
flux-gate magnetometer
Abstract
The flux-gate magnetometer is used to measure the parallel component of the magnetic field of the deep-lying eddy current, which can avoid the influence of the exciting coil when the central magnetic field of the exciting coil is perpendicular to the measurement direction. This method could distinguish line defect and cross defect clearly, and the detection depth of multi-layer Al plates was as high as 14 mm. It was found that the amplitude of the eddy current magnetic field signal of cross defect was greater than line defect, and it decreased slower when the depth of the defect was increasing.
中图分类号 O441.5 TG115.28 DOI 10.11973/wsjc201809003
所属栏目 试验研究
基金项目
收稿日期 2018/4/4
修改稿日期
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作者单位点击查看
联系人作者刘政豪(haodeaa@126.com)
备注刘政豪(1987-),男,博士,主要从事弱磁场测量与涡流检测工作
引用该论文: LIU Zhenghao,ZHU Kangwei,ZHANG Wei,LEI Daifu,WANG Dou. Deep-Lying Eddy Current Testing Based on Measuring the Parallel Component of the Flux-Gate Magnetometer[J]. Nondestructive Testing, 2018, 40(9): 8～13
刘政豪,朱康伟,张玮,雷代富,王斗. 基于磁通门磁强计平行分量法的深层涡流检测[J]. 无损检测, 2018, 40(9): 8～13
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参考文献
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【6】NAGENDRAN R, THIRUMURUGAN N, CHINNASAMY N,et al.Optimum eddy current excitation frequency for subsurface defect detection in SQUID based non-destructive evaluation[J]. NDT&E International, 2010, 43:713-717.
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【12】GERHARD M, OLAF H, VALENTIN U.Deep penetrating eddy currents and probes[J]. Materials Testing, 2007, 49:258-264.
【2】SMITH C H, SCHNEIDER R W, DOGARU T, et al. Eddy-current testing with GMR magnetic sensor arrays[J].Review of Progress in Quantitative Nondestructive Evaluation, 2004, 700:406-413.
【3】DOGARU T, SMITH C H, SCHNEIDER R W, et al.Deep crack detection around fastener holes in airplane multi-layered structures using GMR-based eddy current probes[J].Review of Quantitative Nondestructive Evaluation, 2004, 700:398-405.
【4】NAIR N V, MELAPUDI V R, JIMENEZ H R,et al.A GMR-based eddy current system for NDE of aircraft structures[J]. IEEE Transactions on Magnetics, 2006, 42:3312-3314.
【5】ZHONG C R, HE Y S, LIANG J W,et al. Scanning SQUID microscope NDT system based on eddy current testing[J]. Journal of Superconductivity and Novel Magnetism, 2010, 23:981-983.
【6】NAGENDRAN R, THIRUMURUGAN N, CHINNASAMY N,et al.Optimum eddy current excitation frequency for subsurface defect detection in SQUID based non-destructive evaluation[J]. NDT&E International, 2010, 43:713-717.
【7】KAWANO J, HATO T, ADACHI S,et al.Non-destructive evaluation of multilayer conductor using an HTS SQUID gradiometer[J]. Physica C, 2010, 470:1520-1523.
【8】KAWANO J, HATO T, ADACHI S, et al.Non-destructive evaluation of deep-lying defects in multilayer conductors using HTS SQUID gradiometer[J].IEEE Transactions on Applied Superconductivity, 2011, 21:428-431.
【9】KAWANO J, OGAWAA A, ISHIKAWAA F,et al. Study on non-destructive evaluation of flaws in multilayer duct using an HTS-SQUID gradiometer[J]. Physics Procedia, 2014, 58:208-211.
【10】VERTESY G, GASPARICS A, SZOLLOSY J,et al.High sensitivity magnetic field sensor[J].Sensors and Actuators, 2000, 85:202-208.
【11】GASPARICS A, VERTESY G.Magnetic imaging in non-destructive testing[C]//2010 International Conference on Mechanical and Electrical Technology,[S.l.]:[s.n.],2010:47-49.
【12】GERHARD M, OLAF H, VALENTIN U.Deep penetrating eddy currents and probes[J]. Materials Testing, 2007, 49:258-264.
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